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Subwoofer amp transformer got realy hot now it hums scary loud how can i fix it

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: loud humming

If this is an electric resistance heater then there is no power supply or transformer. I had a baseboard heater that would hum loudly and I found there's a wire that runs along the bottom to connect the far end of the heat element to the electrical wiring at the supply end. This wire becomes magnetized from the current flowing through it and vibrates in the channel it runs through. I was able to open this channel and squirt a bit of silicone caulk in to keep the wire from vibrating and the hum is gone.

Posted on Mar 21, 2007

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SOURCE: loud humming buzzing sound coming from subwoofer

make sure you have the speaker connection right if you do then it is a ground problem try plugging it in a different outlet

Posted on Dec 16, 2008

  • 10 Answers

SOURCE: Loud humming sound from subwoofer

just try leaving it unplugged for a while thats what i did and it fixed it

Posted on Jul 28, 2009

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SOURCE: Subwoofers Creating Independent Noise

Sounds like your RCA's are near your power & ground wires. I would run your RCA''s on the other side or as far away from the power wire as possibly. Sounds like your getting the infamous alternator whine. If none of the above work you can get a in line noise filter to filter out that noise. RCA's can pick up noise when their around anything that has alot of current running through it....Hope this helps

Posted on Mar 28, 2010

homedesigner
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SOURCE: Loud humming sound. Blown power adapter

The power adapter that blew damaged the amplifier circuits inside the sub (or a damaged circuit caused the power adapter to blow)... in either case, if you have electronic skills and access to a oscilloscope, you can trace the signal on the circuit board. The suspect components to look for would be around the connectors for the power supply to the circuit board.

Posted on Apr 08, 2010

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4 Answers

Klh powered subwoofer model ASW10-120B... when you plug in to power... it makes a loud buzzing/humming noise


I would check the caps on the power supply. They are rather large electrolytic capacitors that will look like they burst and/or leaking. When these die, the caps ground and the sub will make a loud buzzing sound. If you are handy with a soldering iron you can replace them yourself. Replace them with the same voltage or a little bigger and same with the size.

If the cap. says 16v 4700pF on it, for example, a 20v 5300pF or a 16v 6200mF cap. will work for this application.

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Jan 05, 2016 | Audio Players & Recorders

1 Answer

Loud hum in my ge rc7200


More than likely the Magnetron is bad, causing the transformer to over heat. Or it could just be the transformer going bad. Either way not a good situation. Both are expensive.

Dec 13, 2014 | GE Microwave Ovens

1 Answer

Pv700 sub woofer has loud hum


If the speakers are turned off and the sound is still there , check the Amps , as it could be voltage transformer noise from the amp . This is caused by non sealing of the transformer .So I am told

Dec 17, 2013 | Boston Acoustics Audio Players & Recorders

1 Answer

Loud hum on mirage omni s8


need to replace the amp assembly...common problem on this model.

Dec 04, 2013 | Mirage OMNI S8 Speaker

2 Answers

Humming sound in subwoofer after it's been playing for a while


It sounds like you are describing an earth loop problem. I won't go into detail in this post, but try an isolation test first. disconnect everything from the reciever except the sub and try connecting say a BATTERY powered mp3 player or cd player to minimise connections to the electrical mains earth. you could also isolate things by taking your sub to a friend's house and trying it on their system.
If it is an earth loop use a process of elimination to find out which two pieces of equipment causes the earth loop. then apply filtering.
you can buy earth loop isolation transformers for about AU$26 and I've used one on my sub myself. Theyhave RCA (phono)plugs on each end and they connect inline with the signal cable to the sub amp.

as for the thumping sound it might be the speaker protection circuitry cutting off the amp to protect the subwoofer speaker from damaged. This might be triggered if the earth loop sound is causing the sub amp to overload and clip.

Failing this there might be a dried out overheated electro capacitor in the amp circuit causing the hum. Hav a chat to your local electronics person, who should be able to spot it!
Hope this puts you on the right track
Happy Hunting!

Jan 07, 2010 | Sunfire Audio Players & Recorders

2 Answers

Older Harman Kardon computer speakers have loud hum


The hum (50 or 60 Hz) is caused by the AC power getting into the entry point of the amplifier. Either the filtering capacitors from the powersource of the speakers have dried up - replace them - or there is a short in the cables.
There is another possibility: if you have kicked the subwoofer  box its transformer might have slipped from its fixings and now is touching the subwoofer speaker frame.
The only way to find which is to open the cases.

Nov 28, 2009 | Harman Kardon HK695 Computer Speakers

1 Answer

Humming sound when on/off


humming sound when on is usual if the volume is turned up.
humming sound the same when on or off could be transformer plates fluxing.
if loud recommend replacement of power supply.
if ok then recommend unplugging the device after use.

Nov 13, 2009 | Velodyne DPS-10 Subwoofer

1 Answer

Sub has started humming with amp turned off. just turned on at wall switch.nothing running


If the hum is from the back of the unit around the amplifier, it may be the transformer. It could be that the mounting is loose.
It could also be that the transformer is going out.

Disconnect all the inputs to the unit, Still hum?

If the hum stops you have something causing noise to the input.

If you have it on a switched circuit, try moving the power plug to a different outlet that is not on a switch. If hum stops, then you have something on that circuit causing the problem

if all inputs are disconnected and it still humms good chance it is the transformer.

Nov 12, 2009 | Velodyne CHT-8 Subwoofer

3 Answers

Loud humming buzzing sound coming from subwoofer


make sure you have the speaker connection right if you do then it is a ground problem try plugging it in a different outlet

Dec 16, 2008 | KLH HTA-4906 System

3 Answers

Loud humming coming from subwoofer


This can be caused due to an increase in local interference. The hum is decreased when you plug in the satellites because the interference is spread over a longer area. You may notice that speakers tend to hum around things like cell phones and power outlets. To see if this is the case, move the speakers to another part of the room if you can, slide the desk around, plug the computer in at another room, something like this. If the hum gets louder or quieter, it is interference at your new place. This can be solved by finding a new area to set up your computer stuff at. Since it's mostly the subwoofer, try elevating it off the ground, there may be a power main running under the floor.

Sep 04, 2007 | Audio Players & Recorders

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